Excavator-bucket.



o. J; MARHNSON.

EXGAVATOR BUCKET.

APPLICATION FILED SEPT. 2B, 1910.

Pateuted'Nov. 15, 1910.

Z SHEETS-SHEET l,

nire eraan oscuri J. iann'rrlvson, on mationen, ILLINOIS/Assioma ro MO'NIGHAN MACHINE courrier, or estraneo, immers, `a oonrona'rron or ILLINOIS.

EXCAVATOBfBUCKET.

To all whom 'it muy concern:

Be it known that l, OSCAR J. MARTINSON, a citizen of the United States of America, anda resident of Chicago, county or' Cook, State of Illinois, have invented certain new and useful Improvements in Excavator- Buckets, of which the following is a specilicati'on.' l

The main object of this invention is to provide an improved form of excavator bucket suitable foruse with a dcrrick and adapted to have its dumping and `loading movements controlled by the manipulation of the hauling and hoisting cables.

A specific construction embodying this inventin is illustrated in the accompanying drawings, in which l l Figure 1 is a side elevation of the excavater bucketand its controlling mechanism when the bucket is in its load carrying position. Fig. 2 is a rear elevation of the same. Fig. 31s a side elevation, showing the method, of connecting the bucket with the derrick and 4illustrating diiierent positions of ithe bucket.

In the construction shown in thexd-rawings', the derrick is of usual type, and comprises a mast 1 and a boom 2 having its upper end supported by a cable 3 in the usual manner. The 4bucket t is provided with a cutting edge 5 at the front of its bottom, and

is supported by trunnions 6 located rear- Wardk of its center et' gravity. and journaled vin a supportingframe in the forni cfa bail 7, which is connected at its upper end with a hoisting cable 8. The hauling cable 9 is divided in front of the bucket so as to provide two parts-10 which are respectively con1iect ed to opposite sides of the bucket at points above and in front oi. the cutting edge 5, and a thirdpart 11 which will be hereinafter re ferred to as the controlling line, the-counted tion between the hauling cable and these parts being made by means of a triangular plate 9A. p

The tilting of the bucket in the bail is controlled by means of a lever 12 ulcruincd at 13 on the bail 7, and having av forwardly eX- tending arm connected with the controlling line'll, and having a rearwardly extending arm adapted to bear downward on the rearward end of the bucket '4a. There is a shoe 14.- inounted on the rearward part of the -lniclnt l1 for engagement with the lever 12 Specification of Letters Patent. Patented NOV, 15, 1910, .Application fded September 28, 1910. Serial No. 584,364.

and provided at itsQforward end with an antiffriction roller 15,. The rearwardly eX- tending arm of the lever 12 is bent at an angle to piiovide a foot or part 16, which bears on the roller 15 and which lis disposed at an angle to! the path of the roller 15 when the bucket urns o n its trunnions' 6. Any part pable f preventing the tipping of` the bucket, and there may thus be' a considerable angul movement of the bucket on its trun nions ,fwhile in its" load carrying position. The part of the lever 12 in front of the part 16 is curved sharply upward, so that as soon as the roller 15 has passed the heel18 of the foot 16,"the bucket will be free to tip for- Wardto its dumping position. Stops 19 at opposite sides of the bucket engage the bail, and prevent it from tilting backward beyond its load carrying position relative to the bail.

The operation of the device shown is as followsz-The bucket is supported by its bail from the hoisting cable, as illustrated in Fig. 3, and when the hauling cable 9 is slack, the bucket will hang in the position indicated by dotted lines and designated A in Fig. 3. As the front ofthe bucket is open, this is the dumping position.' The bucket may now be dropped to the ground `by lowering away on the hoisting cableES. 1f it is desired to drop the bucket at a point inward of the end of theboom 2, it may be drawn to such point'by a suitable pull bn the hauling cable 9 as it is being lowered. l/Vhen it strikes the ground," it will tip to a horizontal position, on account of the shape 4of its front end, and when the hoisting cable is slackened, the bail 7 maybe pulled forward by the hauling cable so `that the parts will assume the position indicated vat `B (Fig. 3). A pull onthe hauling cable 9 will now-cause the cutting edge 5 to cut into the earth and load the bucket.

As soon as strain is applied to thehoist-f ing cable, a part of the strain omtbehal! ground by a pull on the hoisting cable, and

.ing cable is transmitted to the controlling line 11, which pulls upon the levlenl and; causes it to lock the bail and bucketpgethem strain ismaintained Von the hauling cablez.. 9, the bucket may be lifted clear ofthe;

of the lower surface 17 of the foot 16 'is caV will then assumo noeition as at C. lf the 'hauling cable is pai out gradually, so to maintain a strain on the controlling line 11, the bucketrnay be swung to a position below 5 the outer end of the boom. Further paying out of the cable 9 will cause it to release the strain upon the controlling line l1, and the weight of the bucket and its contents, acting through the roller 15, on the inclined 10 surface 17 of the lever, will force the lever out-g. of the way, and permit the bucket to swin to the dumping position, as repre sente 'by the dotted lines in position A. The len h of the surface 17 on the lever 12 provl es for a certain amountof angular movement between the bail 7 and the bucket,

While the bucket is in' itsload carrying position. and thus insures against accidental discharge of the contents of the bucket 2P through a momentary slackening of the hauling cable 9. v

Although but one specific embodiment of this invention is herein shown and described, it will be understood that numerous details of the construction shown may be altered or omitted without departing from the s irit of this invention, as .defined by the fol owing claims.

I claim t 1. In an excavator, the combination of a bucket, a bail pivoted to said bucket back of itsv center of gravity/,hoisting means connected to'Sd bail for liftingsaid bucket,

a hauling cable operatively connected with 35. the front of the bucket, a lever fulcrumed on said bail and adapted to control the tilting of said bucket relatively to said bail, a sheave on said bail7 and a controlling line extendin around said sheave` and connect- 40 ing saidever to'said hauling line, so that `the position of the lever may be controlled by tension on the hauling line.

2; In an excavator, the combination of a bucket o en at the front, a buil uivotally connecte thereto ata point back o the center of gravit thereof, a lever fulerunied on s aid Vbail an having a part extending rearward of its fulcrum and adapted to bear on Said bucket to prevent the sume from tilting forward to its dumping position, a hauling line for Said bucket,` a sheave on said ball, and a controlling line passing over said sheave and connected between said lever and hauling line for controlling the movement of the lever.

A 3, In an excavator, the combination of a bucket, a bail pivoted to said bucket, hoist- 'ing means connected with said bail, `a lever fulcrurned on said bail and having arms extending respectively in front of r wd behind Said fulcrum a -hauling cable operatively connected with said bucket, a sheavc on said bail, a controlling lline assing over said sheave and connecting sai hauling line with 95 one arm of 'sa-id lever, the other arm of said lever being adapted to control the tilting of said bucket in' said bail through the tension on said controlling' line.- f

4. In an excavator, the combination of a bucket, a bail pivoted to said bucket, hoisting means connected with said bail, a lever ulcrumed on said bail and having arms extending respectively in front .of and behind said fulcrum, a hauling cable -o eratively connected with said bucket, a s eave on said bail, a controlling line passing over said sheave and connecting said hauling line with. the front arm of sind Leve?, the other arm of said lever being adapted to control the tilting4 of said bucket in `Seid bail s0 throulgh the tension on said controlling line.

5. n an excavator, the combination lof a bucket, a bail pivoted to said bucket, boist-y ing means connected with said bail, a lever fulcrumed on said bail and having erlns ex 85 tending respectively in front of and behind said i'ulcrum, a hauling cable operatively connected with said bucket, asheave on said bail above said lever, a controlling line passing over saidsheave and connectin 4said 90 hauling line withthe front arm o said lever, the other arm of said lever being adapted to bear downward on said bucket at a point rearward of its ivotal connection to said bail to control t e tilting of said bucket in said bail through the tension onsaid controlling line. u i

6. In an excavator, the combination' of a bucket, a bail pivoted to said bucket, hoistin means eonnectedrwith said bail, a Vlever fu crumed on said bail and having arms extending respectively in front of and behind Said fulcrum, a hauling cable operatively connected with said bucket, a sheave on'said bail, a controlling line as sing over` s aid Sheave and connectlng haulin line with the front arm of said lever, the ot er arm of said lever being adapted to control the tilting of said bucket in said bail through the tension on said controlling line, and an anti-friction roller interposed between said bucket andsaid rearwardly extending arm.

7. In an excavator, the combination of a bucket, a bail pivoted to said bucket, hoistl ing means connected with said bail, a lever iulcrumed on said. bail and having arms extending respectively in front of and behind Said fulcrurn, a hauling cable operatively connected with said bucket, a sheave on said bail, a controlling line passing over .said sheave and connectingsaid hauling line with the front arm of said lever, the

other arm of said lever being adapted to bail through t e tension on said controllingl line, anda ro' er mounted on said bucket behind said bail, Sald rearwardly extending control the tiqling of said bucket 1n said arm of said lever being bent to provide a part coacting with said roller to prevent the `forwardtilting of said bucket, said part befulcrurned on said bail and having arms eX- I tilting 'of said said rearwardly extending arm of said lever agalnst dumping throughout a considerable being bent to provide a part coacting with range of angular movement of said lever. l said roller to prevent the forward tilting of 8. In an excavator, the combination of a i saidbucket, said part being so dis osed as bucket, a bail pivoted to said bucket, hoistl to secure the bucket againstA l umping ing means connected with said bail, a lever throughout a. considerable range of angular ing so disposed as"I to secure the bucket! tending respectively in front of and behind inclined in such direction that the pressure said fulcrum, a hauling cable operatively of the roller thereon will tend to cause said connected with said bucket7 a sheave on said lever to swing toward a position for releasbai1a controlling line assing over said E ing said bucket.

sheave and connecting said) hauling line with Signed at Chicago this 22nd day of Septhe front arm of said lever, the other arm tember 1910.

of said lever bei adapted to control the i loucv Iet in said bail through thetension on .il'con rolling line, a roller i mounted on sli-i lbucket behind said bail,|'

, OSCAR J. MARTINSON. Witnesses:

EUGENE A. RUMMLER,

EDWIN PHELPS.

movement of said lever, and said part being 

